The Holy Kingdom of Gusteko (グステコ聖王国), usually referred to as Gusteko (グステコ), is a country located to the north of Lugnica.
It is a theocracy currently ruled by a mad prince. As it is located in the north, Gusteko has a cold climate and dangerous mountains, which are a very hard environment for people and animals to live in. Because of the eternal snowfall, only cold-tolerant crops can be planted. Instead of animal husbandry, there are many mountains in the steep mountains with magical ore, relying on the mining industry and dealing with magic ore to maintain national strength. Spirits are far more commonplace in Gusteko, than any other country, and thus, the reverence of spirits has become incorporated into the national teachings of the Gustekan church.
The ruler of Gusteko goes by the name of the Holy King and is chosen during an election by Odglass. It is mentioned that the race, blood and origin don't matter for candidates of becoming the Holy King.
An assassin organization led by a person known only as Mama is also based in the country.
As the founder of Gusteko, Odglass created a contract with a person known by the name Holy King, and now Odglass is associated with the election, also having the right to choose who the Holy King of Gusteko will become.
Many years ago, after the creation of the pact with Farsale Lugnica and Volcanica, the sorcerers moved to Gusteko from all over the continent. They were famous for killing people with various spells known as a Curse (呪い), however these are just a subclass of users of magic and spiritual arts of the place.
Albis River (アルビス河 Arubisu Kawa): A river which originates from Kararagi and is for a small part located in western Gusteko.
Pardochia (パルドキア): A mountain where one of the four Great Spirits, Odglass, resides.